Speaker



FIG. 1 is a perspective view of a speaker;

FIG. 2 is a front elevated view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevated view thereof; and,

FIG. 5 is a left side elevated view thereof, the right side being a mirror image thereof.

The broken lines shown in the drawings depict portions of the speaker that form no part of the claimed invention. 

CLAIM The ornamental design for a speaker, as shown and described. 